A cybersecurity firm, CrowdStrike Inc., found traces of at least two sophisticated hacking groups on the Democrats’ network both with ties to the Russian government. Those hackers took at least one year’s worth of detailed chats, emails and research about Trump, according to a person knowledgeable of the breach who wasn’t authorized to speak publicly. CrowdStrike said one of the hacking groups, dubbed Cozy Bear, had previously infiltrated unclassified networks at the White House, the State Department and the Pentagon’s Joint Chiefs of Staff. Another group detected, called Fancy Bear, had targeted private- and public-sector networks since the mid-2000s. In addition to the Democratic Party hack, other emails were made public in recent months that detailed tens of thousands of messages from Democratic operatives. this websiteAmong those were emails of Clinton’s campaign chair John Podesta, which contained thousands of messages to and from Clinton campaign insiders. Clinton’s campaign has said it was notified by the U.S. government that it was investigating Russia for the Podesta hack. The Podesta emails have been publicly released daily by WikiLeaks.